* {
    padding: 0;
    margin: 0;
}

.bigbox {
    background-color: #f1f3f6;
    margin: 0 auto;
    height: 700px;
    width: 500px;
}

.header {
    margin: 0 auto;
    font-size: 30px;
    color: #333;
    text-align: center;
}

.subbox {
    display: flex;
    height: 60px;
    width: 100%;
    justify-content: space-evenly;
    align-items: center;
    margin-top: 10px;
}

.user {
    height: 40px;
    font-size: 14PX;
    line-height: 40px;
}

.menu input {
    height: 40px;
    width: 300PX;
    border-radius: 6px;
}

.register {
    height: 60px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

button {
    height: 40px;
    width: 120px;
    background-color: aqua;
    border-radius: 10px;
}